Today, I was with my seven year old daughter purchasing my husband a present for his birthday in a few weeks. At the register, in the very long line, I asked her where we could hide his present so he wouldn't find it, she responded loudly with "Hide it in your room! He never goes in there!" FML

If the OP is referring to the fact she and her husband do not sleep in the same beds, let alone same room, it's not embarrassing. In fact, sleeping in separate beds is what me and my girlfriend do, and yes we do live in the same house. We do sleep in the same room though, our beds only inches apart.
But sleeping in separate beds is by far the best way to keep your sex drive, intimacy, romance, and your relationship healthy. If I want to wake up my girlfriend with a kiss in the morning, the beds aren't far enough apart I can't slide over. But they aren't close enough where she'll kick me in the middle of the night.
Enjoy sleeping apart, it keeps things fresh.

....really guys? she bought a gift for her husband. she wanted to hide it from him. she asked her kid where she should put it (probably just to make the kid feel like she was part of it) and the kid announced to the whole store that "daddy" never goes in their bedroom. i assume that embarrassing because now the whole store knows that they never fuck, or spend any sort of alone time together.

YDI for cheating on your husband, don't be a slut and maybe he wouldn't just be with you for your kid. At least he's a good father, what good qualities do you have? Are you fun to live with? Guess not. YDI, get a divorce, save him, you slut.

I think the FML is referring to them sleeping in separate rooms, not that anyone is cheating. Also, you kind of flipped out right there, and you might have some deep seeded issues resulting from personal past experiences?